參數資料
型號: M30201MXT-XXXFP
廠商: Mitsubishi Electric Corporation
英文描述: SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
中文描述: 單片16位CMOS微機
文件頁數: 81/159頁
文件大?。?/td> 1496K
代理商: M30201MXT-XXXFP
Unde
Clock synchronous serial I/O mode
deeopmen
Mitsubishi microcomputers
M30201 Group
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
81
Figure 1.74. UART0 transmit/receive mode register in clock synchronous serial I/O mode
Symbol
U0MR
Address
03A0
16
When reset
00
16
CKDIR
UART0 transmit/receive mode registers
Internal/external clock
select bit
STPS
PRY
PRYE
SLEP
0 : Internal clock
1 : External clock
Bit name
Function
Bit symbol
W
R
b7
0
b6 b5
b4
b3
b2
0
b1 b0
0 1
0 (Must always be “0” in clock synchronous serial I/O mode)
SMD0
SMD1
SMD2
Serial I/O mode select bit
0 0 1 : Clock synchronous serial
I/O mode
b2 b1 b0
Invalid in clock synchronous serial I/O mode
AA
AA
AA
AA
AA
AA
Table 1.27 lists the functions of the input/output pins during clock synchronous serial I/O mode. Note that
for a period from when the UART0 operation mode is selected to when transfer starts, the TxD0 pin
outputs a “H”. (If the N-channel open-drain is selected, this pin is in floating state.)
Table 1.27. Input/output pin functions in clock synchronous serial I/O mode
Pin name
Function
TxD0
(P5
0
)
Method of selection
Serial data output
Serial data input
Transfer clock output
Transfer clock input
Port P5
0
direction register (bit 0 at address 03EB
16
)= “1”
(Outputs dummy data when performing reception only)
RxD0
(P5
1
)
CLK0
(P5
2
)
Internal/external clock select bit (bit 3 at address 03A0
16
) = “0”
Internal/external clock select bit (bit 3 at address 03A0
16
) = “1”
Port P5
2
direction register (bit 2 at address 03EB
16
) = “0”
Port P5
1
direction register (bit 1 at address 03EB
16
)= “0”
(Can be used as an input port when performing transmission only)
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